AMS Performance ALP.07.04.0003-1 VR38 Alpha 4.0L Stage 1

AMS Performance VR38 Alpha 4.0L – R35 & Custom Swap Application

The AMS Performance ALP.07.04.0003-1 directly addresses the displacement limitation found in the factory Nissan GT-R R35 VR38DETT engine platform. By expanding the swept volume to 4.0L, this unit eliminates the turbo lag commonly experienced in CBA, DBA, and EBA chassis models when upgrading to GT35 or larger frame turbochargers. The increased stroke provides the mechanical leverage necessary to spool high-pressure setups instantly, solving the low-RPM sluggishness inherent in standard 3.8L blocks while managing extreme cylinder pressure without sleeve migration.

Investing in this completely blueprinted long-block architecture delivers massive Engineering ROI by removing the variable costs of local machine work. Shop owners save approximately 60+ hours of labor by bypassing the complex clearancing required for a stroker rotating assembly installation. This dyno-proven reliability allows tuners to push the R35 GT-R or custom swap projects to 1500+ HP with repeatable consistency. The pre-assembled nature guarantees that the bearing crush and ring gaps are set for competition, drastically reducing the risk of immediate engine failure.

AMS Performance VR38 Alpha Engineering Specifications

• The reciprocating assembly features a 98.0mm by 94.4mm stroker dimension profile
• Peak performance reaches 1500+ HP output with 1100+ lb-ft torque capacity
• Internal compression is set at 9.0:1 for optimal thermal efficiency under boost
• Rotating components consist of Alpha Series Forged Steel to maintain stability
• Cylinder head architecture utilizes CNC-ported aluminum for superior heat dissipation
• The block foundation uses reinforced sleeving to prevent cylinder wall distortion
• Valvetrain configuration follows Alpha Stage 1 to ensure consistent timing control

VR38 Alpha 4.0L Power & BMEP Characteristics

The 94.4mm stroke anchors the torque peak earlier than factory units. This modification drastically improves the transient response of turbochargers, making the platform responsive on street and track. At 9.0:1 compression, the combustion cycle handles high boost safely, ensuring BMEP remains stable without inducing pre-ignition.

Material Integrity & VR38 Durability Engineering

Proprietary forged internals are designed to handle 1500+ horsepower loads. The reinforcement process eliminates cylinder liner cracking issues common beyond 800 lb-ft. Custom alloy pistons control thermal expansion precisely, preventing scuffing and ensuring survival through extreme heat cycles typical of high-performance racing environments.

R35 GT-R & GR6 Drivetrain Integration

This engine bolts directly to 2009-2021+ Nissan GT-R models and factory GR6 transmissions. However, massive torque necessitates a complete transmission gearset upgrade. Neutral balancing of the flywheel and harmonic balancer is required to match the internal reciprocating assembly, preventing destructive torsional vibrations at high RPM.

GT-R, Patrol & Swap Versatility

This 4.0L unit is the premier choice for Nissan Patrol Y61 sand drag racing or custom drift builds. It requires high-octane race fuel to operate safely at rated boost levels. Increased displacement improves off-boost drivability, making a 1500 HP setup manageable in heavy traffic.

Fitment & VR38 Alpha 4.0L Installation Protocol

Installers must verify chassis clearance for high-capacity oil pans required for the stroker crank. The protocol demands a triple-pump fuel system upgrade to support 1500+ HP potential. Verify accessory drive alignment to prevent belt slip during rapid acceleration. Professional priming of the oiling system is mandatory.

Warranty & Support Compliance

Coverage is contingent upon installation by certified facilities and adherence to strict protocols. Claims require documented break-in oil cycles and tuning logs to verify engine health. US-based technical support provides guidance on fluid requirements and startup maps needed to protect the owner’s significant technical investment.

Final installation and chassis compatibility must be verified against manufacturer’s current technical bulletin and vehicle-specific measurements.